The third wave of POTP Prime Masters (Bludgeon and Octopunch) have also been found in Asia (in Thailand), which lets us know that the third wave of toys is now on their way out to countries.
(we just haven't seen wave 2 here yet... so hopefully we aren't going to miss some or all of wave 2 or 3)

As for wave 2 POTP, which has been hard to find in America as well as here, Hasbro in America have said that there should be more being produced and released over the next few months... if retailers want more stock that is.

And Predaking has been found on the Target computers, letting American fans know that it will still end up at some physical stores soon, now that ToysRUs is gone (apparently TRU was the only retailer to stock the Titan size class in-store). It's listed at US$160, which is about AU$230.